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Influence of coarse tailings on flocculation settlement
International Journal of Minerals, Metallurgy and Materials ( IF 4.8 ) Pub Date : 2020-08-15 , DOI: 10.1007/s12613-019-1948-9
Shi Wang , Xue-peng Song , Xiao-jun Wang , Qiu-song Chen , Jian-chun Qin , Yu-xian Ke

The composition of tailings particles in mines plays a key role in the flocculation settlement of slurries. To study the influence of coarse particle tailings (CPTs) on the flocculation settlement of tailings slurries (TSs), static flocculent settling tests, scanning electron microscopy observations, and laser particle size analyses were conducted using the tailings obtained from a copper mine. The results demonstrate that (i) in the accelerated and free settling process, CPTs did not directly settle at the bottom of graduated cylinders; instead, they were netted by the flocculent structures (FSs) and settled together more quickly. The CPTs accelerate the rapid settlement of TSs; the acceleration effect is more obvious when the CPTs content is greater than 50wt%. (ii) The most appropriate flocculant unit consumption (FUC) is 20 g·t−1, and no substantial increase is observed in the flocculant settling velocity with an increase in the flocculant because the effective FSs did not substantially change and thus did not lead to a notable increase in the settling velocity of the solid-liquid interface (SLI). (iii) In the effective settling space of the thickening facility, free water quickly flowed from the pores of FSs, which is reflected in the period from 0 to 1 min.



中文翻译:

粗尾矿对絮凝沉降的影响

矿山尾矿颗粒的组成在淤泥的絮凝沉降中起关键作用。为了研究粗粒尾矿(CPT)对尾矿浆(TSs)絮凝沉降的影响,使用从铜矿获得的尾矿进行了静态絮凝沉降试验,扫描电子显微镜观察和激光粒度分析。结果表明:(i)在加速和自由沉降过程中,CPT不会直接沉降在量筒的底部;取而代之的是,它们被絮状结构(FSs)所束缚,并更快地沉降在一起。CPT加快了TS的快速结算;当CPTs含量大于50wt%时,加速作用更加明显。(ii)最合适的絮凝剂单位消耗量(FUC)为20 g·t-1,并且没有观察到絮凝剂沉降速度随絮凝剂增加而显着增加,这是因为有效FS基本上没有变化,因此没有导致固液界面(SLI)的沉降速度显着增加。(iii)在浓缩设备的有效沉降空间中,自由水迅速从FS的孔中流出,这反映在0到1分钟的时间段内。

更新日期:2020-08-15
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